Using a mouthwash as well as brushing teeth significantly reduces the risk of developing plaque and the early stage of gum disease, a new study has found.

The early stage of gum disease is called gingivitis. The gums can become red and swollen and may also bleed easily. Gingivitis can usually be eliminated by good dental hygiene.

However, if left untreated, the gums can become damaged and the teeth can become loose.

Plaque meanwhile refers to bacteria that build up on the surface of teeth. This can lead to tooth decay and inflammation of the gums.

Scientists followed the progress of almost 150 adults with mild to moderate plaque and gingivitis. They were split into two groups - the first brushed their teeth and used a mouthwash twice a day, while the second brushed their teeth and used a placebo mouthwash twice a day.

"Results show that the group using a germ-killing mouthrinse reduced its occurrence of plaque by up to 26%. Furthermore, that same group showed a 20% reduction in gingivitis," the scientists explained.

They pointed out that mouthwashes can reach almost 100% of the mouth's surfaces, ‘while brushing focuses on the teeth, which make up only 25% of the mouth'.

"Most people brush their teeth for less than one minute, when at the very least, they should be brushing for two minutes. Additionally, only 2-10% of people floss regularly and effectively. Adding a germ-killing mouthrinse twice a day to your daily routine is another way to attack the germs that can cause significant oral health problems," the scientists said.

They added that not all mouthwashes are made to kill bacteria. For example, some are made for whitening teeth. Therefore people should ensure they read the label correctly.

Details of these findings are published in the journal, General Dentistry.